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Published on: July 27, 2018
Identification of two nucleotide sequence sub-groups within Potato mop-top virus
1Department of Plant Protection, Danish Institute of Agricultural Sciences, Research Centre Flakkebjerg, Slagelse, Denmark. SteenL.Nielsen@agrsci.dk
Archives of Virology
|January 31, 2003
Summary
Potato mop-top pomovirus isolates from Danish fields were genetically analyzed. Two distinct subgroups were identified, but symptom development did not correlate with these genetic variations.
Area of Science:
- Plant Virology
- Molecular Biology
- Agricultural Science
Background:
- Potato mop-top virus (PMTV) is a significant pathogen affecting potato crops worldwide.
- Understanding the genetic diversity of PMTV is crucial for developing effective disease management strategies.
Purpose of the Study:
- To investigate the genetic variation among different isolates of Potato mop-top pomovirus collected from Danish potato fields.
- To correlate genotypic variations with phenotypic traits, specifically symptom expression in host plants.
Main Methods:
- Collection of 21 PMTV isolates from various Danish locations.
- Employing reverse transcription-polymerase chain reaction-restriction fragment length polymorphism (RT-PCR-RFLP) on RNA2 regions for genotypic analysis.
- Nucleotide sequencing of a specific region of RNA2 (encoding the readthrough protein) for further genetic comparison.
- Assessing symptom development in indicator plants for phenotypic grouping.
Main Results:
- RT-PCR-RFLP analysis successfully differentiated the 21 PMTV isolates into two distinct subgroups.
- Nucleotide sequence comparison of the readthrough protein region confirmed the grouping established by RT-PCR-RFLP.
- No significant correlation was found between the identified genotypic subgroups and the observed symptom development patterns in indicator plants.
Conclusions:
- Danish PMTV populations exhibit genetic diversity, with at least two distinct genotypes present.
- Symptom expression in indicator plants is not a reliable indicator of PMTV genotype.
- Further research is needed to understand the factors influencing PMTV symptomology and its genetic diversity.
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